Unit 01

Using Objects and Methods

By the end of this unit you can read a line of Java out loud, say what every piece of it does, and predict what it prints before you run it.

15–25% of the AP Exam~32–34 CED periods~16–19 blocks here15 topics

AP Computer Science A · members' unit

Using Objects and Methods is behind a locked door

Units in AP Computer Science A are for people taking the course. Getting in takes a link or a key — signing in on its own doesn't do it.

What's in this unit · 17 min read

  1. 1.1 · Algorithms, programming, and compilers
  2. 1.2 · Variables and data types
  3. 1.3 · Expressions and output
  4. 1.4 · Assignment statements and input
  5. 1.5 · Casting and the range of a variable
  6. 1.6 · Compound assignment operators
  7. 1.7 · APIs and libraries
  8. 1.8 · Comments
  9. 1.9 · Method signatures
  10. 1.10 · Calling class methods
  11. 1.11 · The Math class
  12. 1.12 · Objects: instances of classes
  13. 1.13 · Creating objects
  14. 1.14 · Calling instance methods
  15. 1.15 · String manipulation
  16. Where this goes next

27 quick checksscrollytellingobject instantiation yard

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Sources

  • College Board — AP Computer Science A Course and Exam Description, Effective Fall 2025